Alcatel-Lucent 1643 AMS - Multiplexer Section Protection (MSP)

Multiplexer Section Protection
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Multiplex Section Protection (MSP) is used to protect the traffic in a point-to-point
connection. A requirement for this kind of protection is that the transmission units and
lines are doubled.
Multiplex Section Protection is only applicable for 1643 AM or 1643 AMS network
element configurations with STM-1 interfaces.
MSP provides the capability for switching the transmission path from the working
section to the protection section in a point-to-point connection. The protection line
cannot be used for carrying low priority traffic.
To protect a multiplexer section in a point-to-point connection.
A protection setting to protect the transmission path against transmission failures in a
point-to-point connection (MS-AIS, LOF, MS-DEG) and port equipment failures.
Principle
In a point-to-point connection between network elements, protected by MSP, the lines
and units must be doubled. One pair is selected as a designated worker and the other
pair is designated protecting. The capacity in the protection or stand-by section must be
reserved and is not available for traffic.
Simply put, the protection or stand-by section carries the same traffic as the worker
section and it cannot be used for carrying any other kind of traffic.
A trail continues to use the working route until a fault condition occurs or an external
switch request is issued to switch to the protecting route.
Example of MSP protection.
Revertive
In the case of failure when in the Revertive mode the traffic switches to the protecting
line and switches back when the failure is solved.
Non-Revertive
In the Non-Revertive mode the traffic switches to the protecting line and remains on
the protected line even when the failure is solved.
Traffic provisioning
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
8-21